This expression is used as a rebuke, often in constructions similar to "If X thinks that Y, he/she has another think coming!" Sometimes the word got is included, in the familiar constructions has got and have got, as "(someone)'s got another think coming", "they've/you've got another think coming".

The form to have another thing coming is often seen, and may have been aided by a mishearing of the /k/ of think blended with the /k/ of coming, making think sound like thing.

Another common colloquial pronunciation in the US sounds like have another think a-comin'.